Meet the team

Giulia Ferrini manages OGMP 2.0 and is one of the co-founders of IMEO.

She has 12+ years of experience at the UN where she worked on the design and implementation of climate change projects.

Her experience led her to work with governments, financial institutions, the private sector and not-for-profit organisations involved in climate change mitigation.

Giulia holds a MA in International Relations from the III University of Rome, in Italy, and a MSc in Politics and Governments from the London School of Economics, in the UK.

Lisa Solomchuk is the Acting Programme Manager to the OGMP 2.0 team and is an environmental expert with particular expertise in
air quality and emissions management and mitigation. ​

She holds a B.Sc. in Applied and Environmental Geology from the University of Calgary and an M.Sc. in Environmental Economics from the University of London. Lisa's career began in air quality, working for consultancies before joining Shell, where she spent 15 years in various roles related to air quality, methane, greenhouse gas emissions, environmental management, and business development. During her tenure at Shell, Lisa served as the Global Expert for Air Quality, a role in which she set internal standards and corporate direction for air emissions improvements, in addition to providing technical support, developing best practice guidance, and delivering implementation plans for upcoming external reporting changes. 

Georgie Passalaris is the Stakeholder Engagement Lead for the OGMP 2.0 team. She is a senior sustainable development leader with over 15 years of experience in corporate sustainability roles and public private partnerships, designing and delivering
sustainability strategies, social impact initiatives and leading stakeholder engagement.​

Georgie has developed and led global social impact programmes in the private sector and led the impact measurement and management practice for the World Economic Forum’s grant-funded multistakeholder partnerships. ​

She holds a Bachelor of Arts and a Master's in Tri-Sector Collaboration from Singapore Management University. 

Monika Oczkowska Bergeron is the Coordinator of the OGMP 2.0, and leads the overall coordination of the International Methane Emissions Observatory (IMEO) under which the Partnership operates.

Before joining UNEP’s Brussels Office as a policy officer in 2019, Monika did research for the Energy Centre of Jacques Delors Institute in Paris, worked at the Representation of the European Commission in the UK and for national diplomatic institutions in Brussels. Monika holds a master’s degree in Environmental Policy and Regulation from the London School of Economics and a dual BA degree in European Social and Political Studies from Sciences Po Paris and University College London.

Gabriella Lorance is the Junior Coordinator of OGMP 2.0 and works on the team coordination of UNEP’s IMEO.  

Prior to joining UNEP, Gabriella gained a bachelor’s degree in Physiological Sciences from Marquette University, on a Pre-Medical track. She also has previous background in various clinical medical settings. 

Tania Meixus is a Senior Advisor in the OGMP 2.0 team, with over 15 years of experience in the gas business in different departments of Enagás. During the last years in the industry, Tania focused on the management, quantification, and abatement of methane
emissions. Tania was chairwoman of the methane emissions group in Gas Infrastructure Europe and coordinated the OGMP 2.0 mirror group of the gas mid/downstream segments. She was also deeply involved in other associations and initiatives as the European Gas Research Group (GERG), MARCOGAZ, the Methane Guiding Principles and the International Gas Union (IGU).​ 

She holds a M.Sc. in Environmental Chemical Engineering from the University of Oviedo and performed a Management  Development Program at the IESE Business School. 

Debbie Walker is a Senior Advisor to the OGMP 2.0 team. She has extensive experience in upstream oil and gas operations and methane emissions monitoring, reporting and reduction activities, having held various roles across both environmental and facilities engineering functions within Chevron.  ​

In February 2022, Debbie joined the World Bank Group’s Global Flaring and Methane Reduction partnership as a technical advisor where she supported collation of global gas flaring data and analysis from satellite observations and was the lead author of GFMR’s annual global gas flaring tracker report. She also provided support to developing economies on flaring and methane mitigation, associated gas utilization technologies and effective regulatory and policy mechanisms. In July 2024, Debbie joined the OGMP2.0 team and supports members in the US, Canada, Latin America and Central Asia.  ​

Debbie holds an MSc degree in chemistry from the University of Glasgow and a PhD in atmospheric chemistry from the University of Cambridge. 

Najla Lahiani is a process engineer with over 15 years of experience in the oil and gas industry, having held diverse roles
across field operations and project management. Emissions management has consistently been a central focus throughout her career, with a particular emphasis on methane measurement and abatement in the upstream sector during the years before joining the OGMP 2.0 team. This period included chairing the IOGP Methane Expert Group under the Low Carbon Operational Efficiency
Committee, as well as contributing to the Technical Advisory Group of the World Bank’s Global Flaring and Methane Reduction Partnership. Najla currently works as OGMP 2.0’s senior upstream advisor.

Heliana is an OGMP 2.0 Upstream Expert for Latin America and the Caribbean, with a solid corporate background in the upstream oil and gas sector, across operations, engineering, and business-facing roles.​

She began her career as a Field Engineer and went onto hold multiple positions across the upstream value chain, building experience in operational environments as well as in technical functions supporting oil and gas operators and service companies. She later transitioned into consulting in sustainability, with a strong focus on the oil and gas industry and its decarbonization journey. Prior to joining UNEP, she held a leadership role within an energy-focused AI studio, working at the intersection of technology and the energy sector.​

Heliana holds a degree in Food Engineering from Universidad Nacional del Sur, Argentina and pursued further studies in Chemical Engineering at the University of Montpellier, France. She has also specialized in climate change management and completed a fellowship on “Changing the Energy Landscape” for Latin America.

Hocine is an OGMP 2.0 Midstream Technical Expert at UNEP, where he supports oil and gas companies in strengthening the measurement and reporting of methane emissions. Drawing on technical guidance, field experience, and data analysis, he helps organizations transition toward accurate, measurement-based approaches aligned with the OGMP 2.0 framework.​

Before joining UNEP, Hocine gained hands-on experience with an international service provider, taking on various roles at the UAE office, where he leveraged advanced detection technologies and robust data management practices to enhance emission inventories.​

Working across the MENA and Asia regions, he developed a well-rounded perspective shaped by exposure to diverse operational environments, emission sources, and international collaboration.​

Hocine holds a B.Sc. and a Master's in Oil & Gas Mechanical Engineering, both from the University of Boumerdes, Algeria.

Mercy Mbua is a Systems Engineer and Environmental Scientist with over five years of experience in methane  emissions measurement, quantification, reconciliation, and reporting. She holds a BSc in Petroleum Engineering from Kenyatta University, Kenya, and both an MSc and PhD in Systems Engineering from Colorado State University, US.​

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Before joining OGMP, Mercy worked as a Graduate Research Assistant at the Methane Emissions Technology Evaluation Center (METEC), where she gained extensive hands-on experience in methane measurement, emissions quantification, inventory reconciliation, and evaluation of methane data from both oil and gas and non-oil and gas sources.​

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Her background in Systems Engineering enables her to approach methane measurement, reconciliation, and mitigation from a holistic perspective, integrating measurement science, data analytics, operational practices, and policy considerations to support effective emissions  management and reporting.

Roberto Paglini is a Downstream Expert in the  OGMP2.0 Technical Team, supporting downstream operators in the way they measure and manage their emissions. His background includes hands-on experience in leak detection and quantification programs as well as controlled release experiments, mixing field work with in-office data analysis. ​

Roberto cooperates with Utrecht University on algorithms development to support site-level measurements across the downstream segment of the value chain.​

​He holds a MSc in Energy and Nuclear Engineering and a PhD in Energy Engineering from Politecnico di Torino.

Ronald’s career began in environmental remediation and community relations working for various consultancies. In 2007, Ronald joined Huntsman Chemical where he spent over 14 years in various corporate roles related to environmental governance, EHS management systems audits, product safety/product stewardship and regulatory affairs, and corporate social responsibility matters. After
leaving the chemicals industry and joining Apache Corporation, Ronald gained first-hand experience in OGMP, while continuing to work on sustainability reporting and biodiversity projects for Apache. ​

​Ronald has a B.S in Environmental Science from the University of California-Riverside, and a master’s degree in Environmental Management from Duke University. 

Zeid is an OGMP 2.0 Upstream Technical Expert, supporting oil and gas companies in improving the measurement and reporting of methane emissions. His work combines technical guidance, field experience, and data analysis to help organizations transition toward accurate, measurement-based approaches aligned with the OGMP 2.0 framework.​

Holding a Master’s degree in Petrochemical Process Engineering from the University of Boumerdes, Algeria. Prior to his current role with UNEP, Zeid worked with a Level 4 service provider in the UAE, where he applied advanced detection technologies and robust data management practices to enhance emission inventories.​

His experience spans across the MENA and Asia regions, enabling him to collaborate with diverse teams and gain exposure to a wide range of emission sources and operational environments.

From 2020 to 2025, in the International Energy Agency, Tomás led analysis on methane abatement and the development of the
Global Methane Tracker. He also contributed to other aspects of energy supply and energy transition within the World Energy Outlook team.​

From 2013 to 2020, Tomás worked at the Brazilian Institute of Environment on offshore oil and gas permitting, overseeing follow-up activities and leading the technical working group on risk management and emergency response. During 2019-2020, he took on the role of Deputy Coordinator of oil and gas production activities.​

Tomás holds an Environmental Engineer degree from the Federal University of Rio de Janeiro and Master in Public Policies in
the focus area of Sustainability, Strategies and Development.​

Colette Schissel works as a Data Analyst on the OGMP 2.0 team, utilizing her background in methane measurement techniques and their accuracy.

Colette is a researcher specializing in developing measurement informed methane emission inventories.  

She holds a bachelor’s degree in Chemical Engineering from Cornell University, in addition to a PhD in Chemical Engineering from the University of Texas at Austin. Additionally, Colette has previous engagements with Scientific Aviation and the Gas Technology Institute.  

Ricardo is a Data Analyst supporting OGMP 2.0 and IMEO. Before joining UNEP, he worked at the Office of the Chief Economist at Environmental Defense Fund (EDF) performing quantitative and qualitative research on energy markets, air pollution and climate change.​

He holds a Bachelor’s degree in civil engineering from Tecnológico de Monterrey and a Master’s degree in environmental engineering from Columbia University in the City of New York.

Rima Bouslama is a Data Analyst with the OGMP 2.0 team, with a strong background in data analytics, visualization, and integration. She holds an M.Sc. in Civil Engineering from the University of Saskatchewan, where she researched the impacts of conventional and unconventional oil and gas activities on groundwater resources, applying statistical and spatial modeling to large datasets. She also holds a B.Eng. in Geosciences Engineering with a specialization in Petroleum Engineering from the University of Tunis El Manar and a diploma in Sustainable Development and Human Rights from the UN-mandated University for Peace. 

Rima previously worked as a Geoenvironmental Engineer at Okane Consultants, where she managed environmental monitoring data and provided insights into the controls on metal leaching and acid rock drainage within waste rock storage facilities. As a Communications and Data Analysis Intern with UNEP FI, she supported the Net-Zero Banking Alliance by analyzing net-zero target submissions, developing Power BI dashboards, and contributing to accountability mechanisms for member banks. She also supported the Pollution and Circular Economy team by researching the links between climate change and the circular economy in the metals and mining sector. 

Seungyeon Ko is an OGMP 2.0 data analyst with strong background in data analytics, visualization, and integration.  

She holds a BS in Materials Science from Chicago and an MS in Data Analytics Engineering from Boston. Seungyeon’s expertise spans creating interactive data visualization dashboards, particularly using Power BI, Power Query, and DAX, as well as integrating various data sources.  

Her prior experience as a Data Science Consultant at the UN honed her skills in developing clean, visually appealing, and intuitive dashboards, which she also embedded into web applications for enhanced accessibility. Seungyeon has a proven track record in accurately analyzing, visualizing, and interpreting large datasets.